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Dual-additives enable stable electrode-electrolyte interfaces for long life Li-SPAN batteries

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Chinese Chemical Letters 2024年第5期35卷 459-465页

作者： zhenqiang Guo Huicong yang Qian Wei Shengjun Xu Guangjian Hu Shuo Bai Feng Li School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Biochemistry and Molecular Biology College of Life ScienceChina Medical UniversityShenyang 110122China Dalian National Laboratory for Clean Energy Dalian 116023China Shenyang King Power Technology Co. Ltd.Shenyang 110016China

Sulfurized polyacry.onitrile(SPAN)is proposed as a promising cathode material for lithium sulfur ***,the continuous side reactions at the electrolyte-electrode interfaces as well as the slow redox kinetics of SPAN cathode deteriorate the electrochemical *** this study,an electrolyte with dual-additives comprising 2-fluoropyridine(2-FP)and lithium difluorobis(oxalato)phosphate(LiDFBoP)was used to improve the performance of Li||SPAN cells.2-FP has a lower lowest occupied molecular orbital energy than that of the solvents in the electrolyte,leading to its prior reduction.A LiF-rich film can be formed on the electrode,effectively improving the stability.of the electrolyte-electrode interfaces and prolonging the ***,LiDFBoP could form an electrolyte-electrode interface film containing a large amount of Li_(x)Po_(y)F_(z) species,compensating for the kinetic deterioration caused by the lower ionic conductive of LiF formed at the electrolyte-electrode ***,an electrode-interface film with good chemical stability and high Li^(+) transport was established by LiF and Li_(x)Po_(y)F_(z)-rich *** Li||SPAN cell with the electrolyte containing dual-additives demonstrates an excellent capacity retention of 97.5%after 200 cycles at 1.0 C,25℃,comparing to 56.2%capacity retention without ***,the rate capacities of cells with dual-additives can reach 1128.1 mAh/g at 5 C,comparing to only 813.5 mAh/g using electrolyte without *** results shown that the dual-additives in electrolyte provide a promising strategy for practical application of lithium sulfur batteries with SPAN cathodes.

关键词： Sulfurized polyacry.onitrile Lithium metal Interface film 2-Fluoropyridine Difluorobis(oxalato)phosphate

Novel quantum circuit implementation of Advanced Encryption Standard with low costs

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Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 11-26页

作者： zhenqiang Li BinBin Cai HongWei Sun HaiLing Liu LinChun Wan SuJuan Qin Qiaoyan Wen Fei Gao State Key Laboratory.of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory.of Cryptology Beijing 100878China

In this study, we examine how the quantum circuit of the Advanced Encryption Standard(AES) can be optimized from two aspects, i.e., number of qubits and T-depth. To reduce the number of qubits, we present three kinds of improved quantum circuits of S-box for different phases in the AES. We found that the number of qubits in the round function can be decreased by introducing the circuit sending |a> to |S(a)>. As a result, compared with the previous quantum circuits where 400/640/768 qubits are required,our circuits of AES-128/-192/-256 only require 270/334/398 qubits. To reduce the T-depth, we propose a new circuit of AES's S-box with a T-depth of 4. Accordingly, the T-depth of our AES-128/-192/-256 quantum circuits become 80/80/84 instead of120/120/126 in a previous study.

关键词： AES S-box quantum circuit composite field arithmetic

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Species composition and distribution of common Crassostrea and Saccostrea oysters along the coast of Hainan Island

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Journal of oceanology and Limnology 2024年第5期42卷 1609-1620页

作者： Ruijing LU ya CHEN Peizhen MA Cui LI Zhen ZHANG Guochen ZANG zhenqiang LIU Haiyan WANG Qingdao Agricultural University Qingdao 266109China Institute of oceanology Chinese Academy of SciencesQingdao 266071China University.of Chinese Academy.of Sciences Beijing 100049China

oyster cultivation is a pivotal economic industry in Hainan Island,South China,where a high oyster species diversity is ***,the specific distribution and biodiversity.of oyster resources in the island have remained *** elucidate the diversity.of oyster species and their distribution there,307 oyster samples were collected from 29 sites in the intertidal zone around the island,and were identified using both morphological and molecular approaches.A minimum of 12 oyster species were identified in taxonomy,including Crassostrea species(*** angulata,***,***,***,***,***,and ***),and Saccostrea species(***,***,***,***,and ***).The results revealed a remarkable diversity.of oyster species along the coast of the *** noteworthy are that *** and *** constituted 36%and 22%of the collected specimens,*** study provided a comprehensive overview on current state of oyster biodiversity in Hainan,serving as a valuable reference for conservation and research on species distribution and resource dynamics in oyster populations.

关键词： distribution of oysters Crassostrea Saccostrea oyster resource

Effect of crystallization temperature and propylene sequence length on the crystalline structure of propylene-ethylene random copolymers

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Chinese Science Bulletin 2008年第12期53卷 1804-1812页

作者： GoU QingQiang LI HuiHui yU zhenqiang CHEN ErQiang ZHANG yuDong yAN ShouKe Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Department of Polymer Science School of Chemistry Peking University Beijing 100871 China Beijing Research Institute of Chemical Industry SINOPEC Beijing 100013 China candidate of Graduate University.of Chinese Academy.of Sciences Beijing100039 China

Crystallization behavior and resultant crystalline structure of a series of temperature-rising elu-tion-fractionated specimen of a Ziegler-Natta catalyst-synthesized propylene-ethylene random co-polymer were studied by DSC, WAXD and AFM. The experimental results indicate that both crystalliza-tion temperature and propylene sequence length exhibit great influence on the crystallization behavior and crystalline structure of the copolymer. It was found that the ethylene co-monomers acting as point defects inserted into the polypropylene chains play an important role in the formation of γ-iPP. As the co-monomer content increases, the crystallizable sequence length of iPP decreases, which produces an appropriate condition for its γ crystallization. At the same time, the existence of chain defects leads to a lower crystallinity.of the copolymer and imperfection of the resultant crystals. For each individual sample with certain propylene sequence length or ethylene content, the increment of γ-iPP crystal content with increasing crystallization temperature demonstrates that higher crystallization tempera-ture is in favor of the γ-iPP crystallization. Pure γ-iPP crystals have been got in samples with propylene sequence length lower than 21 under suitable crystallization conditions.

关键词：结晶温度晶体乙烯共聚物

Influence of Nd^(3+) concentration on mid-infrared emission in PbF_(2) crystal co-doped with Ho^(3+) and Nd^(3+) ions

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Journal of Rare Earths 2024年第3期42卷 479-487,I0002页

作者： yan Chen Juncheng Tan Peixiong Zhang Weibi Zheng Lin Li Lianhan Zhang Zhen Li yin Hang zhenqiang Chen Department of optoelectronic Engineering Jinan UniversityGuangzhou510632China Guangdong Provincial Engineering Research Centerof Crystal and Laser Technology.Guangzhou 510632China Research Center of Laser Crystal Key Laboratory of High Power Laser MaterialsShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai201800China

A promising series of Ho_(y)Nd_(x)Pb_((1-x-y))F_2(x = 0, 0.01, 0.02, 0.03, 0.04;y = 0.02) crystals was grown by the Bridgman method. The influence of the Nd^(3+)ions concentration on mid-infrared(~2.0, ~2.9 and ~3.9 μm)fluorescence emissions of Ho^(3+)ions in the PbF_(2) crystal excited by 808 nm laser diode was investigated in this work. The energy transfer mechanism between Nd^(3+)ions and Ho~(3+)ions under different concentrations of the Nd^(3+)ions was systematically analyzed. The results show that the Nd^(3+)ions have good sensitization and deactivation effect on the Ho^(3+)ions to stimulate the mid-infrared fluorescence emissions. The experimental analysis proves that the sensitization efficiency.of the Nd^(3+)ions is relatively stable at around 93.45% with varying Nd^(3+)-doping concentrations. Concentration dependence studies indicate that the concentration of the Nd^(3+)ions has significant influence on mid-infrared *** the doping concentration of the Nd^(3+)ions is up to 2.0 at%, the intensity.of ~2.0, ~2.9 and ~3.9 μm emissions all reach the maximum. The output characteristics of a 3.9 μm laser are simulated, and it is found that with the increase of the Nd^(3+)-doping concentration, the peak power, pulse width, and peak energy all meet the trend of first increasing and then decreasing, and Ho_(0.02)Nd_(0.02)Pb_(0.96)F_(2) crystal displays the best performance. All the results show that the Nd^(3+)/Ho^(3+)co-doped PbF_(2) crystals might act as a useful optical medium for mid-infrared laser applications.

关键词： Crystal growth Mid-infrared PbF_(2) Rare earth ions

Coordination cage with structural “defects” and open metal sites catalyzes selective oxidation of primary alcohols

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Science China Chemistry 2023年第6期66卷 1714-1721页

作者： Tian-Pu Sheng ying Wei Parvathi Jampani Chang Li Feng-Rong Dai Shuping Huang zhenqiang Wang Zhong-Ning Chen State Key Laboratory.of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry Fuzhou UniversityFuzhou 350108China University.of Chinese Academy.of Sciences Beijing 100049China Department of Chemistry&Center for Fluorinated Functional Materials University of South DakotaVermillionSDUSA

Coordination cages with intrinsic enzyme-like activity are a class of promising catalysts for improving the efficiency.of organic *** present herein a viable strategy to conveniently construct multimetallic active sites into a coordination cage via self-assembly.of a pre-formed sulfonylcalix[4]arene-based tetranuclear copper(II)precursor and an amino-functionalized dicarboxylate *** cage exhibits a“defective”,partially.open cylindrical structure and features coordinatively labile dimetallic Cu(II)*** by this unique inner cavity environment,promising catalytic activity toward selective oxidation of primary alcohols to carboxylic acids at room temperature is *** studies reveal that the coordinatively labile dimetallic Cu(II)sites can efficiently capture and activate the substrate and oxidant to catalyze the reaction,while the confined nano-cavity environment modulates substrate binding and enhances the catalytic *** study provides a new approach to designing biomimetic multifunctional coordination cages and environmentally friendly supramolecular catalysts.

关键词： coordination cages open metal sites alcohol oxidation host-guest systems supramolecular chemistry

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Engineered exosomes from different sources for cancertargeted therapy

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Signal Transduction and Targeted Therapy 2023年第4期8卷 1644-1663页

作者： Menghui Zhang Shengyun Hu Lin Liu Pengyuan Dang yang Liu zhenqiang Sun Bingbing Qiao Chengzeng Wang Department of Hepatobiliary and Pancreatic Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450001China Department of Colorectal Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450001China Henan Institute of Interconnected Intelligent Health Management The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450001China Department of Ultrasound The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450001China Department of Radiotherapy Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenan 450001China

Exosome is a subgroup of extracellular vesicles,which has been serving as an efficient therapeutic tool for various *** exosomes are the sort of exosomes modified with surface decoration and internal therapeutic *** appropriate modification,engineered exosomes are able to deliver antitumor drugs to tumor sites efficiently and precisely with fewer treatment-related adverse ***,there still exist many challenges for the clinical translation of engineered *** instance,what sources and modification strategies could endow exosomes with the most efficient antitumor activity is still poorly ***,how to choose appropriately engineered exosomes in different antitumor therapies is another unresolved *** this review,we summarized the characteristics of engineered exosomes,especially the spatial and temporal ***,we concluded the recent advances in engineered exosomes in the cancer fields,including the sources,isolation technologies,modification strategies,and labeling and imaging methods of engineered ***,the applications of engineered exosomes in different antitumor therapies were summarized,such as photodynamic therapy,gene therapy,and ***,the above provides the cancer researchers in this community with the latest ideas on engineered exosome modification and new direction of new drug development,which is prospective to accelerate the clinical translation of engineered exosomes for cancer-targeted therapy.

关键词： summarized Engine instance

4-Formyl-2-(2H-benzotriazol-2-yl)-phenol: an ESIPT chromophore

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Chinese Science Bulletin 2014年第34期59卷 4741-4751页

作者： y.o Lu yulong Gong Huiying Ma zhenqiang Wang Haili Li Ziping Luo Hongru Li Fang Gao School of Chemistry and Chemical Engineering Chongqing University

In the present work, excited state intramolecular proton transfer(ESIPT) emission properties of a new benzotriazole derivative 4-formyl-2-(2H-benzotriazol-2-yl)-phenol(C1) were studied. 4-Formyl-2-(2H-benzotriazol-2-yl)-methoxy-benzene(C2), 4-formyl-2-(2H-benzotriazol-2-yl)-phenyl acetate(C3) and 4-methyl-2-(2H-benzotriazol-2-yl)-phenol(C4) were used as the reference molecules.1H NMR chemical shift of hydroxy group in C1 was located at more down field than that of C4 or p-hydroxy-benzaldehyde(C5), respectively. C1 showed two absorption bands in the range of 260–400 nm zones in various solvents, while C2 and C3 exhibited single absorption band. The equal molar mixtures of C2/C5 or C3/C5 showed single absorption band.C2 and C3 displayed single fluorescence emission band in various solvents, while C1 exhibited dual emission bands in some strong polar solvents. Furthermore, the second emission band in these strong polar solvents showed the large Stokes shift. The results show that the second emission band of C1 was produced by ESIPT. C2 and C3 could not undergo ESIPT due to no hydroxy group. The geometry.optimization calculation of enol and keto forms in the ground and excited states of C1 provided tough theoretical evidences of ESIPT.

关键词：苯并三唑甲酰基激发态分子内质子转移苯酚极性溶剂生色发射性能三唑衍生物

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PECVD淀积氮化硅薄膜性质研究

太阳能学报 2004年第3期25卷 341-344页

作者：王晓泉汪雷席珍强徐进崔灿杨德仁浙江大学硅材料国家重点实验室杭州310027

使用等离子体增强化学气相沉积(PlasmaEnhancedChemicalVaporDeposition,PECVD)在P型硅片上沉积了氮化硅(SiNx)薄膜,使用薄膜测试仪观察了薄膜的厚度、折射率和反射光谱,利用扫描电子显微镜(SEM),原子力显微镜(AFM)观察了截面和表面形貌... 详细信息

使用等离子体增强化学气相沉积(PlasmaEnhancedChemicalVaporDeposition,PECVD)在P型硅片上沉积了氮化硅(SiNx)薄膜,使用薄膜测试仪观察了薄膜的厚度、折射率和反射光谱,利用扫描电子显微镜(SEM),原子力显微镜(AFM)观察了截面和表面形貌,使用傅立叶变换红外光谱仪(FTIR)和能谱仪(EDX)分析了薄膜的化学结构和成分。最后,考察了薄膜在经过快速热处理过程后的热稳定性,并利用霍尔参数测试仪(Hall)比较了薄膜沉积前后载流子迁移率的变化。

关键词：太阳电池 PECVD 氮化硅